Did you press F12 more than once? You can only press it once, otherwise 2-3 times switches booting from MAIN to booting from backup Instead.
Flash it again now with the latest BIOS, then they should both be F7, but not sure if that will flash the main or not? You may need to just flash it again, then do the ALT + F12 carefully only once.
Yes, once you get through this initial stuff you will be fine and you can flash easily and without hassles using Qflash.